From: Crayon (no email)
Date: Mon Jan 01 2007 - 11:52:18 EST
Hi
I'm new to postfix (having used qmail for several years). In my old setup
I had maildrop rules that are run on addresses which I use to receive
mailing lists. So for example, for an address that is used solely for
receiving this list, the maildrop rules would check for the presence of
these headers:
Sender:
Precedence: bulk
List-Post: <mailto:>
List-Help: <http://www.postfix.org/lists.html>
List-Unsubscribe: <mailto:>
List-Subscribe: <mailto:>
If the check fails the mail is unlikely to have come from the list and is
most likely spam (or a direct reply from someone on the list - which I
don't want) and gets rejected.
What I would like to know is, can something similar be implemented using
postfix's header_checks? My reading of the docs suggests it can't be done
because postfix only processes a single header at a time and makes a
decision per header.
Another thing is I would like to reject mails don't have a "Subject:"
header (or it is empty). Again, because of the way the header_checks are
done I don't think I can check for the absence of a particular header?
-- Crayon
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